fitz gerald



3 Sheets8heet 1.

(No Model.)

W H. FITZ GERALD.

DIE FOR MAKING WATCH CASE STEMS.

Patented Mar. 23, 1886.

N PETERS Phuwuuw hen Walllingion. D. c.

(No Model.) 3 Sheets8heet 2.

W. H. FITZ GERALD. I

DIE FOR MAKING WATCH CASE STE-MS. No. 338,501. Patented Mar, 23, .1886.

(No Model.) r 3 Sheets-Sheet3.

W. H. FITZ GERALD.

DIE FOR MAKING WATGH CASE STEMS.

No; 338,501, Patented Mar. 23, 188.6.

N. PER-12s, mwu Wahington. D.C.

UNITED STATES PATENT OFFICE.

WALTER H. FITZ GERALD, OF BROOKLYN, NEW YORK.

DIE FOR MAKING WATCH-CASE STEMS.

SPECIFICATION forming part of Letters Patent No. 338,501, dated March23, 1886.

Application filed October 3, 1885. Serial No. 178,931. (No model.)

To all whom it may concern.-

Be it known that I, WALTER H. FITZ GER- ALD, of Brooklyn, in the countyof Kings, and in the State of New York, have invented certain new anduseful Improvements in the Manufacture of Watch-Case Stems; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,in which Figure 1 is a perspective view of the dies employed by me inthe construction of watchcase stems. Fig. 2 is a like view of theplungers used with said dies. Fig. 3 is a crosssection of the dies and acentral longitudinal section of the plungers, as combined for oper-.ation upon a case-stem. Fig. 4. is a perspective view of the stem beforebeing operated upon by said dies and plungers. Fig. 5 is a like view ofthe same after such operation. Figs. 6 and 7 are respectively centrallongitudinal sections of the stems shown in Figs 4 and 5; and Figs. 8and 9 are cross-sections upon lines 00 x and z 2', respectively, ofFigs. 4 and 5.

Letters of like name and kind refer to like parts in each of thefigures.

My invention has for its object the construction of watch-case stemsfrom sheet metal with ring-sockets which form part of and are into: gralwith the same; and to this end said in vention consists in theconstruction of the dies and plungers employed, substantially as and forthe purpose hereinafter specified.

In the practical use of my invention a stemblank having the general formof a stem is produce by drawing a disk of sheet metal into the form ofan elongated cup with a semispherical closed end, a, then necking thesame by means of grooving-rollers, and, lastly, expanding said blankradially and compressing it longitudinally within dies, the result ofwhich operations is the blank A. (Shown in Fig. 4.) The blank A is nowplaced between two die-blocks, B and B, that are provided within andacross their contiguous faces with half-round coinciding recesses b,which together have the shape and size of said blank,

and, in addition thereto, are each provided with an annular groove, 12,that is located near the circumferential groove b, which is provided forthe reception of the bead a of said blank. The die-blocks B, beingclosed together, a plunger, 0, having a cup-shaped inner end, 0, isplaced against the closed end a of the stem A, where it operates as ananvil, and a second plunger, D, having a flattened pointed body, d, asseen in Fig. 2, is forced into the open end of said stem, the largesttransverse dimensions of said plunger D being in a line with the centersof the annular grooves b of the said die-blocks.

The operation of the plunger D is to force the metal upon or within thesides of the stem A, adjacent to the annular grooves b, outward into andcause the same to fill said grooves, by which means ring-sockets a areformed upon opposite sides of said stem, which are a part of andintegral with its body.

\Vhile the operation described is preferably performed upon a blank stemwhich is con structed from sheet metal in the manner hereinbeforedescribed, it may be successfully performed upon a cast-metal blankwhich is constructed from metal having sufficient ductility.

Having thus described my invention, what I claim is- As an improvementin devices for the construction of watch-case stems, die-blocks providedwithin and across their contiguous faces with coinciding recesses whichcorrespond in shape to the exterior of a case-stem having ring-sockets,in combination with an anvilplunger for sustaining the closed end ofsaid stem. and a flattened pointed plunger, which is adapted to enterinto the open end of said stem and to force the metal thereof laterallyinto the ring-socket recesses of said dieblock s, substantially as andfor the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this18th day of September, A. D. 1885.

WVALTER H. FITZ GERALD.

\Vitnesses:

STEDMAN H. HALE, A. M. CROMMELIN.

